SDSS J114816.64+525150.3 | |
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![]() SDSS J114816.64+525150.3 captured by
Two Micron All Sky Survey | |
Observation data ( Epoch ) | |
Constellation | Ursa Major |
Right ascension | 11h 48m 16.64s |
Declination | 52° 51′ 50.3″ |
Redshift | 6.419 |
Apparent magnitude (V) | 25.53 [1] |
See also: Quasar, List of quasars |
SDSS J114816.64+525150.3 (J1148+5251) was the most distant known quasar when it was discovered in 2003, at redshift Z=6.419. [2] The quasar is powered by a 3x109 solar mass supermassive black hole. [3]
The Virtual Telescope Project imaged the quasar between March and April 2024, with a 350-millimeter (14 in) Celestron Schmidt–Cassegrain telescope, on a Software Bisque Paramount ME robotic mount. A total of 81, 300-second exposures were combined, for a total of almost 7 hours of exposure, recording sources as faint as about magnitude R=25. The team termed it "the most distant quasar observable at visible wavelengths". [4]
We report the detection of high excitation CO emission from the most distant quasar currently known, SDSS J114816.64+525150.3 ...